Relationship Between State-Level Google Online Search Volume and Cancer Incidence in the United States: Retrospective Study

Charles A. Phillips   ¹ , MD ;   Allison Barz Leahy   ¹ , MD ;   Yimei Li   ^{1, 2, 3} , PhD ;   Marilyn M. Schapira   ^{4, 5} , MD, MPH ;   L. Charles Bailey   ^{1, 3, 6} , MD, PhD ;   Raina M. Merchant   ^{7, 8} , MD, MSHP

¹ Division of Oncology and Center for Childhood Cancer Research, The Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, PA, United States

² Department of Biostatistics, Epidemiology and Informatics, University of Pennsylvania, Philadelphia, PA, United States

³ Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States

⁴ Department of Internal Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States

⁵ Center for Health Equity Research and Promotion, Philadelphia Veterans Affairs Medical Center, Philadelphia, PA, United States

⁶ Department of Biomedical and Health Informatics, The Children’s Hospital of Philadelphia, Philadelphia, PA, United States

⁷ Penn Medicine Center for Digital Health, University of Pennsylvania, Philadelphia, PA, United States

⁸ Department of Emergency Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States